diff --git a/app/Services/PdfMaker/Designs/Utilities/DesignHelpers.php b/app/Services/PdfMaker/Designs/Utilities/DesignHelpers.php
index f7d933a87041..886b10fcd4b0 100644
--- a/app/Services/PdfMaker/Designs/Utilities/DesignHelpers.php
+++ b/app/Services/PdfMaker/Designs/Utilities/DesignHelpers.php
@@ -79,7 +79,7 @@ trait DesignHelpers
                 $document->importNode($element, true)
             );
 
-            $html = $this->document->saveHTML();
+            $html = $document->saveHTML();
 
             return str_replace('%24', '$', $html);
         }
diff --git a/app/Utils/HtmlEngine.php b/app/Utils/HtmlEngine.php
index 044945ac1b32..fc0d7160619b 100644
--- a/app/Utils/HtmlEngine.php
+++ b/app/Utils/HtmlEngine.php
@@ -315,6 +315,8 @@ class HtmlEngine
         $data['_rate2'] = ['value' => '', 'label' => ctrans('texts.tax')];
         $data['_rate3'] = ['value' => '', 'label' => ctrans('texts.tax')];
 
+        $data['$font-size'] = ['value' => $this->settings->font_size . 'px', 'label' => ''];
+
         // $data['custom_label1']              = ['value' => '', 'label' => ctrans('texts.')];
         // $data['custom_label2']              = ['value' => '', 'label' => ctrans('texts.')];
         // $data['custom_label3']              = ['value' => '', 'label' => ctrans('texts.')];